Blowpipe-lamp.



No. 646,985. Patented Apr. lo, |900.

.|. HEINZ` Y.

(Application led Feb. 7, 1900.) (No Model.)

NrTnD STATES PATENT OFFICE.

JOIIANN HEINZ, OF PFORZHEIM, GERMANY.

BLOWPIPE-LAIVIP.

SPECIFICATION forming part of Letters Patent No. 646,985, dated April 1o, leoo.

riginal application filed October 17, 1899, Serial No. 733,905. Divided andthis application iiled February 7,1900.

. Serial No. 4,388. (No model.)

To ci/Z whom t may concern: Be it known that I, JOHANN HEINZ, a citizen of the Empire of Germany, residing at Pforzheim, Germany, have invented certain new and useful Improvements in Blowpipe-Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved construction in blowpipe-lam ps wherein the flame is automatically controlled by the air-pressure in the blowpipe.

This invention has been illustrated and described, but is not specifically claimed, in my application filed October 17, 1899, Serial No. 733,905, of which this is a divisional application.

In bloWpipe-lamps as heretofore constructed the supply-valve for the combustible'gas has been actuated by the expansion of an accor dion or bellows like air-chamber contained Within the lamp-casing, which air-chamber in expanding actuates weighted elbow-lever connected to the valve. According to the present inventionA the air under pressure in the blowpipe serves to close a valve-controlling circuit, for example, by causing the same to act directly upon a piston or diaphragm connected to a contact-rod, which in being urged forward closes the circuit of an electromagnet, which in turn moves an armature connected to the gas-controlling valve.

In order to more clearly elucidate my invention, I will now give a detailed description of the same, reference being had to the accompanying drawings, in which the same characters of reference designate the same parts throughout the several views, and in which- Figure lis a vertical central section through a blowpipe-lamp embodying my invention in its preferred form; Fig. lf, a detailed View of a modified form of contact-stem device; Fig. 2, a vertical central section on the plane of line 2 2, Fig. l; Fig. 3, a sectional plan view on line 3 3, Fig. l; and Fig. 4, a diagram of the electric circuit employed.

As shown in Fig. l, the hlowpipe ct is provided with the usual 'branch pipe b, which is connected by a flexible tube with the lamp proper', A, the said flexible tube being slipped over the end of the blast-pipe c', extending out from the lamp A.

In the upper halfof the lamp-casing A', which in the present instance is` formed of two halves or hemispheres secured together, a soft-wrought-iron core A2 is fixed by a number of screws S. On this core is mounted a solenoid R, consisting of a number of turns of copper wire of suitable diameter-suola for eXample, as three hund red and sixty-three turns of copper wire of 0.4 millimeter diameter= ^one end G ot' which passes out through the casing, beinginsulated through the lamp by an ebonite sleeve g, while the other end, which is also insulated from the lamp-casing, is in conducting connection with the bindingpost I. (See Fig. 3.) From the binding-post an electrical circuit passes to any suitable source of electric energy-such as a battery V, Fig. els-thence to the binding-post II, Fig. 3, and thence through the casing A to the cylinder C and piston B, to be referred to hereinafter. The core A2 has a central passage through its length, and through this passes a brass stem F, which carries at its upper end a conical valve E, while its lower end carries a wrought-iron disk P, whose position on the stem F may be adjusted preferably by means herein shown. AThese means consist in a screw-thread provided on the lower end of the valve-stem F and a corresponding inner screw-thread on the Wrought-iron disk adapted to engage the threaded stem. By this means the disk may be screwed up or down on the said stem and locked inits Various positions by means of the lock-nut M, also threaded onto the screw-threaded stem F.

On the lower half of the lamp-casing A2 is cast a cylinder C, which is fitted witha movable piston B, as shown, carrying an upwardly-extending stem which ts into an opening in the upper end of the piston below the end G of the circuit-wire. This opening sjs of the cylinder is preferably arranged in an n cbonite stopper D, which closes the top of the cylinder, and thereby prevents the admission of dirt, While, on the other hand, it serves as a guide to the stem b of the piston B.

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arrest any moisture which may be carried along by the air-blast. The said trap, as in the former case, consists of a bulb fj, arranged below the blast-pipe c and preferably illed with absorbent or dehyd rating material y2, such as wadding or other fibrous material. At this point the blast-pipe c is divided bya diaphragm c2, which dips almost to the bottom of the bulb y', thereby diverting the blast downwardly through the absorbent or dehydrating material and compellingr the same to discharge its moisture before reaching the flame.

The combustion-gas enters the lamp at the inlet H, where its flow is-controlled by the cock h. It then passes through the bottom or lamp casing A', around the conical valve E when the same is open, and thence through the openings Z to the flame-cup L, which is filled with fine copper wire or the like, so as to produce a gentle and evenly-disseminated issue of gas. A by-pass pipe Z (shown in Fig. 2 and also in dotted lines in Fig. 1) serves in the usual manner for the supply of a very small amount of gas for the constantly-burning igniting flame.

The operation of this blowpipe-lamp willbe obvious from the foregoing. If the operator .blows into the blowpipe, the compressed airrtherein will raise the piston B or diaphragm BQ and the stem b or b thereof will be thereby raised so as to contact with the circuit-wire G, thereby establishing an electric circuit, as indicated inthe diagram of Fig. 4. By this means the core A becomes energized and thedisk P is raised more or less, whereby the valve E is also raised to allow sufficient gas for the blowpipe-flame to pass around it, which gas as it emerges from the cup L becomes ignited by the small'bypass jet Z. When the blowpipe action ceases, the piston drops,whereby the circuit is broken, so that the disk P again falls away from the electromagnet R and the valve E closes by gravity.

What I claim, and desire to secure by Letters Patent of the United States, is

l. In blowpipe-lamps, a gas-valve, and an armature connected thereto, an electromagin combination with a blowpipe and a blasti pipe communicating therewith, an air-cylinder communicating with the latter, and a movable member for closing off the air-cylinder behind the makeand-break connection, whereby the circuit of the electromagnet is closed whenever air is forced through the blowpipe.

2. In blowpipe-lamps, a gas-valve, and an armature connected thereto, an electromagnet, a make-and-break connection arranged in the circuit of the electromagnet and comprising a fixed and movable contact, in combination with a blowpipe and a blast-pipe communicating therewith, an air-cylinder communicating with the latter, and a movable member closing off the air-cylinder behind the make-and-break connection and connected to the movable contact of the same.

3. In blowpipe-lamps, the combination of an electromagnet and its circuit, with an armature and a gas-valve connected with the same, a blast-pipe, an air-cylinder communicating therewith, and a piston provided with a circuit-closing stem arranged within the cylinder and adapted to be advanced by the pressure of air within said cylinder,whereby the yblast will cause the said stem to close the circuit of the magnet to operate the gas-valve.

4. In blowpipe-lam ps, a blast-pipe, a cylinder connected with the same, a piston arranged to move within said cylinder and provided with a con tact-stem, in combination with an electromagnet, one of whose circuitwire ends is in the path of the contact-stem, an armature arranged opposite the electromagnet, and a gas-valve connected to the armature.

5. In blowpipe-lamps, a gas-valve, an armature connected therewith, an electromagnet opposite said armature, and a circuit for the same having a wire end in combination with a blowpipe having a branch pipe, a cylinder communicating with said branch pipe, a contact-stem arranged in said cylinder opposite the wire end of the circuit, and a movable member connected to the contact-stem and closing off the air behind the same; whereby the contact-stem is forced against the wire end of the circuit of the electromagnet when air is forced into the cylinder, thereby closing the said circuit and energizing the magnet.

In testimony whereof I affix my signature in presence of two witnesses.

y JOHANN HEINZ.

Witnesses:

JACOB ADRIAN, KARL KNAPP.

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